• 创建网络管理者

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

• 设置响应数据类型

[manager.responseSerializer setAcceptableContentTypes:[NSSet setWithObjects:@"text/html", nil]]; 

• 将要发送的文件进行上传

 [manager POST:url parameters:body constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        // 获取图片数据
        
        NSData *fileData = UIImageJPEGRepresentation(imageData, 1.0);
        // 设置上传图片的名字
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        formatter.dateFormat = @"yyyyMMddHHmmss";
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.png", str];
        [formData appendPartWithFileData:fileData name:@"userfile" fileName:fileName mimeType:@"image/png"];
        
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        // 返回结果
         success(responseObject);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        failure(error);
    }];

• 参数
• name : 上传文件的key
• mimeType：image/png
• fileName：上传图片时图片的名字根据